* gnu/packages/linux.scm (<pam-service>, <pam-entry>): New record
types.
(pam-service->configuration, pam-services->directory,
unix-pam-service): New procedures.
(%pam-other-services): New variable.
* guix/store.scm (add-text-to-store): Make 'references' optional.
* tests/store.scm ("dead-paths", "references"): Use 'add-text-to-store'
with no optional argument.
* doc/guix.texi (The Store): Adjust accordingly.
* gnu/system/vm.scm (/etc/passwd): Rename to...
(passwd-file): ... this. Add 'shadow?' keyword parameter. Change
format of ACCOUNTS, and fix CONTENTS.
(example2): Adjust accordingly. Create both /etc/shadow and
/etc/passwd, the latter being used by getpwnam(3) & co. when nscd is
not running.
* build-aux/hydra/gnu-system.scm (%core-packages): New variable.
(%packages-to-cross-build): Make an alias for %CORE-PACKAGES.
(hydra-jobs): Check for the 'subset' argument, and honor it for values
"all" and "core".
* gnu/packages/grub.scm (<menu-entry>): New record type.
(grub-configuration-file): New procedure.
* gnu/system/vm.scm (qemu-image): Remove parameters 'linux',
'linux-arguments', and 'initrd'. Add 'grub-configuration' parameter.
Honor them, and remove grub.cfg generation code accordingly.
(example2): Use `grub-configuration-file', and adjust accordingly.
* gnu/system/vm.scm (qemu-image): Add 'populate' keyword parameter and
honor it; make it an input.
(/etc/shadow): New procedure.
(example2): Call it; build 'populate' script, and pass it to
'qemu-image'.
* gnu/system/vm.scm (qemu-image): Use (guix build linux-initrd). Remove
'mknod' calls; use 'make-essential-device-nodes' to populate /dev on
the target image.
* gnu/packages/linux-initrd.scm (qemu-initrd): When /root/dev exists,
don't call 'make-essential-device-nodes'.
* guix/scripts/substitute-binary.scm (guix-substitute-binary)["--substitute"]:
Show the Nar size, when available.
* guix/ui.scm (show-what-to-build): Add 'TODO'.
This significantly reduces I/O when building profiles, especially with
lots of package-specific sub-directories (such as 'share/emacs/24.3',
'texmf', etc.)
* guix/build/union.scm (union-build)[file-tree](others-have-it?): New
procedure. Use it in the 'enter?' parameter of 'file-system-fold';
change 'skip' parameter accordingly.
* tests/union.scm ("union-build"): Ensure that 'include' is a symlink
and 'bin' is a directory.
* gnu/packages/python.scm (python-2): Rename this to...
* gnu/packages/python.scm (python): ...this, rename this to...
* gnu/packages/python.scm (python-3): ...this. Reverts to version 2 as the
default input for packages requiring Python.
* gnu/system/vm.scm (qemu-image): Add #:inputs-to-copy and
#:boot-expression parameters. Honor them. Append INPUTS-TO-COPY to
the #:inputs argument for `expression->derivation-in-linux-vm'.
(example2): Add #:boot-expression and #:inputs-to-copy arguments.
* gnu/packages/linux-initrd.scm (qemu-initrd): Add (guix build utils) to
#:modules, and use it. Copy .scm and .go files to /root.
* guix/build/linux-initrd.scm (bind-mount): New procedure.
Ludovic Courtès